Most airlines will take a pretty harsh stance when it comes to training and re-takes. Any delays in your graduation will disprupt crewing and scheduling plans, so they will want trainees to put in the effort so they will graduate on time, even if it means that the company have to seem somewhat threatening.
Plus their courses are regulated by whichever aviation authority they come under. There are rules regarding pass-marks and when you can do a re-take.
In your case, it may seem harder as you have a lot of experience to UN-LEARN, if that makes sense.
Looking on the positive side, at least with FR, you only have one aircraft type to learn.